Company Filing History:
2 out of 832,961 Years Active: 2004-2005
Title: Hiroki Shoji: Innovator in Magnetic Thin Film Technology
Introduction
Hiroki Shoji is a prominent inventor based in Miyagi-ken, Japan. He has made significant contributions to the field of magnetic thin film technology, holding 2 patents that showcase his innovative approach to magnetic materials.
Latest Patents
Hiroki's latest patents include a magnetic thin film production method and a magnetic recording device. The first patent describes a magnetic thin film with a saturation magnetic flux density of 2 T or more and a coercive force of 2 Oe or less, specifically designed for use in recording heads. This magnetic thin film consists of an iron carbide film that includes a martensite (α') phase as the principal phase, along with carbon and iron as constituent elements. The iron carbide film is characterized by a body-centered tetragonal structure, where the c-axis serves as the axis of hard magnetization, and the c-plane acts as the plane of easy magnetization.
The second patent focuses on a magnetic recording medium that effectively suppresses the effects of thermal agitation while reducing the average grain diameter and standard deviation of magnetic crystal grains in a ferromagnetic metal film. This innovation allows for the maintenance of the film thickness of both the metal under-layer and the ferromagnetic metal layer forming the recording layer. The magnetic recording medium features a ferromagnetic metal layer made of a cobalt-based alloy, with a seed layer of tungsten provided between the base material and the metal under-layer.
Career Highlights
Hiroki Shoji has established himself as a key figure in the development of advanced magnetic materials. His work has led to significant advancements in the efficiency and performance of magnetic recording devices.
Collaborations
Hiroki has collaborated with notable colleagues, including Migaku Takahashi and David Djulianto Djayaprawira, contributing to a dynamic research environment that fosters innovation.
Conclusion
Hiroki Shoji's contributions to magnetic thin film technology highlight his role as a leading inventor in the field. His patents reflect a commitment to advancing magnetic materials, which are crucial for modern recording devices.